Hone



Patented Nov. 8, 1938 eNirEo 'ESEEAIEFS or FlCE 4Clain1s. got sigso) The object of my invention is to. provide a hone'of the kind used by-barbers-in sharpening razors, which is inexpensive in construction and which will cut away the steel'of therazor in a smooth and uniform manner and the abrasive particles will be prevented from cutting too. deeply into the steel, and further to provide a hone in which the abrasive particles will, when they become dulled by continual use, be carried away from the surface of the hone and the sharp abrasive particles beneath will be exposed for honing purposes.

A further object is to provide a hone of this character in which the fine particles of steel from the razor being sharpened will not become lodged in the interstices between the abrasive particles but may be easily removed from the surface of the hone.

A further object is to provide a hone of this character which will remain in the condition known to barbers as dry, that is to say, the hone will not absorb moisture to such an extent as to cause dust from the air to become absorbed by proceed as follows: I first thoroughly mix together four (4%) per cent of carborundum in finely divided form known to the trade as carborundum flour and F. F. carborundum, also four (4%) per cent of lamp black and eightyeight (88%) per cent of sulphur. I first thoroughly mix said ingredients and then heat the mass until the sulphur is liquefied and then pour it into moulds of the size and shape which it is desired to give to the finished hones. When the mass has fully set, the hones are sufficiently hard and tough to withstand the uses to which they 40 are ordinarily subjected, and have about the same general appearance as the hones now in common use made of carborundum and sulphur, except that they are black.

In use I have demonstrated that with substan- 45 tially equal amounts of carborundum and'aluminum, on the surface of the hone, the aluminum being relatively soft and fragile will, to some extent, during a honing operation be pressed down into the spaces between the particles of carborun- 50 dum and thereby fill such spaces and prevent dust and particles of steel from becoming lodged therein; also, some of the carborundum particles will have sharp edges projecting more or less above the general surface of the hone and the 55 aluminum will cover substantially all but the tip of such prqjecting edge and thereby limit ,7 the depth to whichsuch edge; will 'c ut into'fa razor 1- blade,, sc, that after a honing operation'th side 1,.and de of, t e bla e w v elaiw sew and freefrom deep scratches. 5

I I haven also foundinpractice thatafter a certain period of 1 use .the projecting particles of carborundum become relatively smooth, thereby decreasing the cutting efficiency of th'e hone. When, or before, this occurs with my improved 10 hone the relatively soft and fragile aluminum on the surface is worn away and removed, and this releases the worn particles of carborundum and they, too, are carried away and new carborundum particles presented to the surface, and in this connection I have demonstrated that by having substantially equal parts of carborundum and aluminum, the surface particles are Worn away and removed before the projecting edges of the carborundum are worn too smooth to perform efiicient cutting operations upon a razor blade. The sulphur element of the hone wears away and is removed more rapidly than the aluminum element, hence, does not interfere with the operation. just described.

The lamp black element is, to some extent, moisture repellent, and when the hone has once dried out, then the moisture from the atmosphere will notcollect upon the surface or in the spaces between the particles of the hone, and dust upon the surface of the hon-e may be easily rubbed off, whereas, with the hones in common use it frequently occurs that water of condensation mixes with dust and forms a pasty mass which seriously impairs the eihciency of the hone. 5

With my improved hone the sharp projecting edges of the abrasive are prevented from cutting too deeply with the razor blade because the aluminum also engages the razor blade and limits the depth to which the razor blade can be penetrated by the abrasive. Furthermore, because the aluminum is relatively soft and fragile it will wear away and carry away with it the surface particles of abrasive before they have become smoothed or dulled to such an extent as to reduce the efficiency of the hone, and finally the hone will remain dry and may be easily cleaned by rubbing with a cloth because it is to a substantial degree moisture repellent.

I have found in use that by using relatively 5 small and substantially the same proportion of the abrasive substance and the metallic substance contained in a body of much larger proportion than the abrasive and metal combined, and with said body made of a material that,

soft metals or body forming materials having:

similar characteristics, and obtain the and advantageous results.

I claim as my invention:

1. An improved hone, comprising a body formed of sulphur melted and moulded into the form of a hone and containing relatively small and substantially equal parts of finely divided carborundum, finely divided aluminum and lamp black, evenly distributed throughout said body.

2. An improved hone, comprising a body formed same new of sulphur melted and moulded into the form of a hone and containing approximately 4% of finely divided carborundum, approximately 4% finely divided aluminum, and approximately 4% of lamp black evenly distributed throughout said body.

3. An improved hone, comprising a body melted and moulded into the form of a hone and containing relatively small and substantially equal parts of a finely divided abrasive and finely divided metal of such degree of pliability that such portions thereof that project above the surface of the hone will be bent down into the pockets or depressions in the surface of the hone and around portions of the abrasive particles by the pressure usually applied to a blade during a honing operation, said abrasive and metal being evenly distributed throughout the body.

4. An improved hone, comprising a body melted and moulded into the form of a hone and containingrelatively small and substantially equal parts of a finely divided abrasive and finely divided metal'of such degree of pliability that such portions thereof that project above the surface of the hone will be bent down into the pockets or depressions in the surface of the hone and around portions of the abrasive particles by the pressure usually applied to a blade during a honing operation, and a moisture-repellant substance, said abrasive, metal and moisture-repellant substance being evenly distributed throughout the body.

' WILLIAM VANLANDINGHAM. 

